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G. G. WOLFE.

GRATE AND PIRE CHAMBER POR STOVES 0B. RANGES.

No. 525,831. Patented Sept. 11,1894.

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G. G. WOLPE.

GRA'IB AND FIRE CHAMBER FOR STOVES 0B. RANGES.

Patented Sept. 11, 1894.

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G. G. WOLFE. GRATB AND HRB GHAMBBR FOR sTovBs 0R RANGES. No. 525,831.Patented Sept. 11, 1894.

UNITEDk 'STATES PAT-ENT OFFICE.

GURDON Gr. WOLFE, OF TROY, NEW- YORK, ASSIGNOR TO THE FULLER & WARRENCOMPANY, OF SAME PLACE.

GRATE AND FIRE-CHAMBER FOR STOVES OR RANGES.

SPECIFICATION forming part of Letters Patent No. 525,831, datedSeptember 11, 1894. Application filed March 25, 1889. 'Serial No.304.598. (No model.)

To all whom it may concern:

Be it known that I, GURDON G. WOLFE, of the city of Troy, county ofRensselaer, and State of New York, have invented a new and usefulImprovement in Grates and Fire- Ohambers for Stoves or Ranges, of whichthe following is a specication.

My invention relates to the manner of constructing and arranging an ovalgrate to adapt it to be horizontally and reciprocatingly rotated on itsdiametrical center, for use in combination with an oval hre-chamber.Where a square lire-box or chamber is used having greater length thanwidth, the combustion of the fuel is not uniform therein from the factthat the draft force will seek its most easy means and direct passagethrough the grate and fire at the front edge of the latter, while at thecorners and rear sides of the chamber the combustion is less vigorousand effective; and when such a firepot or chamber is provided with agrate that is shaken by a lateral and horizontal vibration from end toend, each reciprocation of the grate where stopping suddenly .at thee'nd with a jar, has the effect to pile up the coal at the ends of thechamber, where the best combustion ofthe fuel is not had. It is toremedy these difficulties that is the object of my invention.

Accompanying this specification to form a part of it there are fourplates of drawings, containing` eleven figures illustrating myinvention, with the same designation of parts by letter reference usedin all of them.

Of these illustrations Figure 1 shows atop View of a cooking rangecontaining my invention and improvement. Fig. 2 shows a section taken onthe line w', of Fig. 1, through the fire-chamber and grate. Fig. 3 is asection taken through the grate and firepot on the line a02, m2, of Fig.1; the parts illustrated at Figs. 2 and 3 being shown in larger sizethan at Fig. 1. Fig. 4 illustrates a front elevation of a range,containing my invention with a part of the front wall of the stoveremoved, where opposite the lire-chamber and grate. Fig. 5 shows a topView of the grate removed from the stove. Fig. 6 shows another top viewof the grate with the draw center shown as drawn out. Fig. 7 is a topview of the frame which supports the grate and which frame containsrollers on which the grate turns. Fig. 8 is a section of the grate frametaken on the line 063,003, of Fig. 7. Fig. 9 shows a longitudinal andcentral section of the grate removed from the stove, and reduced in sizefor convenience of illustration. Fig. 10 shows a top view of thesupplemental or draw center part of the grate shown as separated fromthe latter. Fig. 1l is a front edge elevation of the draw center part ofthe grate shown at Fig. lO.

The several parts of the range thus illustrated, and also of the partsthereof containing my invention are designated by letter reference andthe function of the parts is described as follows:

The letter T designates the boiler hole top of the range; S,its sidewalls; A,its ash-pit, and W its front.

The letter P designates the fire-chamber, which is of an elliptical oroval form having its interior side walls tapering inwardly as extendeddownwardly.

The letter G', designates the grate proper, which is also elliptical inform, and it is supported within the range on the frame F, far enoughbelow the bottom of the lire-chamber P to leave the usual clinkercleaning passage O. The grate proper is made with air passages a?, andis constructed with a downwardly projected foot f at the front, thefunction of which will be subsequently described. This grate properrests on the rollers R of the frame F, and has downcast serrated endse2, and a downcast serrated rim e', surrounding the central opening 02.This frame F is attached to the inner walls of the stove by connectionsmade at a, and it is constructed with a cross web or brace b',slide-ways S2, and rollers R turning in slots N, with the face of therollers projecting above the face of the frame F.

The letter G2, designates the draw center part of the grate, formed withprojections p', on its side edges, and an outward projection p2, on itsunder opposite side edges. The projection 1c', being arranged to restloosely in the slide ways S2 of the frame F, and the outturnedprojections p2, to pass in under the lower edge of the slide ways ateach side to ICO z 5 f', with the slot in the bar.

keep the 'parts in place as the draw center is moved out or pushed in.This draw center grate part is provided with apertures a6.

The letter V designates a U-form opening made in the draw center part ofthe grate at the front, which opening widens out as extendedfrontwardly, and at its inner end near the center of the grate part G2it is constructed with a shelf o2, made with an opening o, for theentrance of a pivot pin p6, on the lower sideof the shaking bar B, saidbar where heyond the pivot pin being constructed on its inner end with apoint n, that enters a slot n2, see Figs. 3,10, and 11, in the gratepart G2, at the end of said opening V, so as to vibrate therein.

The shaking bar B is made with a longitudinal slot S4, adapted toreceive the downwardly projected foot f of the grate proper, see Fig. 3,so that when the bar B is in position and is reciprocated laterally onits pivot pin p6, between the outwardly flaring sides of the opening V,the grate proper is reciprocatingly rotated by the engagement of thefoot When it is desired to dump the fire, then the bar B is drawn outand with it the drawcenter part G2, which leaves an opening throughwhich the contents of the fire chamber may be passed to the ashpit. Thesupplemental or draw center grate part G2 is arranged enough below thegrate proper G to allow air to freely enter between them to aid thecombustion; and the general edect upon the fuel on the grate when thelatter is reciprocatingly rotated is to keep the fuel in an even layerupon the grate.

I am well aware that a drawer center grate constructed with slide-waysbelow a grate proper is a well known feature of stove structure, and Idisclaim the same broadly considered.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. The combination with the fire-pot P and the supporting frame F, ofthe elliptically formed grate G formed with downcast serrated ends e2, acentral opening and a foot f', the draw-center grate G2 mounted to slideon the frame F below the grate G and formed with a U-shaped opening Vterminating 1n a slot n2, and the shaking-bar B formed with a slot toengage the foot f of the grate G and a point n to engage the slot n2ofthe grate G2, substantially as and for the purpose specified.

2. The combination of the grate G formed with downcast serrated ends andserrated central portion provided with an opening O2, and formed withthe foot f; the frame F having rollers R journaled therein andslide-ways S2; the draw-center grate G2 mounted on the slideslof theframe F 'and formed with a fiaring opening V having a shelf o2, havingan opening 04, and the shaking-bar B formed with a slot to take the footf,and a pin p to engage in the openingo4, substantially as described.

Signed at Troy, New York, this 2d day of v August, 1888, and in thepresence of the two witnesses whose names are hereto written. GURDON G.VVOLFE. Witnesses:

W. E. HAGAN, CHARLES S. BRINTNALL.

